Lock



J. C. MOCK AND B. F. WI LLISTON.

LOCK.

APPLICATION FILED MAR. 11, I920.

1,348,234. Patented Aug. 3, 1920.

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JAMES C. MOCK AND BENJAMIN F. WILLISTON, OF DETROIT, MICHIGAN, ASSIGNO TO JOHN M. FITZGERALD, OF RIVER -FORE$T, ILLINOIS.

LOCK.

v Specification of Letters Patent.

Patented Aug. 3, 1920.

Application filed March 11, 1920. Serial No. 364,913.

tively high degree of security.

An importantspecific object is to provide a simple form of lock which may not be opened by striking it with or upon another object, (as is the case with simple locks in which a spring-pressed catch constitutes the locking element) but which requires a key for its manipulation, thus add- H ing an element of security and avoiding'the objection of casual invasion or interference in many cases where a substantial difliculty in opening the look without the proper key is sufficient to prevent the threatened inva r sion. Instances of this kind are in railroad practice where switches, signal boxes, hand cars, tool chests, etc., along the right-ofway must be kept locked against casual in- -terference by boys and other irresponsible persons rather than against a determined attack, and in. such and a large variety of other situations a lock of the present kind is of peculiar importance.

In the accompanying drawings, which form a part of this specification we have shown these improvements in a highly advantageous form as applied to the construction of a lowriced padlock having the advantages hereinabove pointed out.

In .these drawings Figure 1 is a side view of the lock complete; Fig. 2 is an end view thereof; Fig.3 is a medial vertical section through the lock body and nut-like element of the device of Fig. 1, the bottom plate being shown artly in side View; Fig. 4 is a side view of the bottom plate; Fig. 5 is a top view of the bottom plate; Fig. 6 is a perspective of the locking element or nut; Fig. 7 is a perspective of the key suitable for the nut-like part shown in Figs. 3 and 6; Figs. 8, 9 and 10 are respectively an end view of the nut like element similar to Fig. 6, an end view of the ke therefor and a fragmentary side view 0 the key,

showing .a modification in the key features; Figs. 11, 12 and 13, and Figs. 14, 15 and 13 are views corresponding respectively with Flgs. 8, 9 and 10, showing other modifications of the key features.

The body 10 of our improved lock is shown as a casting and'may be considered as of gray iron. It is made hollow at 11 to reduce weight. An annular seat 12 is provided against which rests the bottom plate 14, which is also shown as a casting.

This bottom plate is provided with the proecting part 15 which is transversely bored for the rivet 16 extending through and headed upon the sides of the body 10. The

bottom is thus securely held in position by a single rivet, but it may be secured in any other approved way.

We provide a shackle, bail or bow 20 having its free end 21 projecting into a recess 22 in the body 10 when in locked position. The other end portion 23 of the bail is considerably longer than the free 'end portion and is screw-threaded throughout the part normally within the body. It projects into the body through a hole slightly larger than the diameter of the part 23.

The body 10 is recessed at 24 with a hole circular in cross section and into this hole fits slidingly the cylindrical nut-like element 25 which is axially bored and threaded so as to screw nut-fashion upon the threaded part 23 of the bail.

The bottom member 14 is provided with a pair of rests or seats 26 and 27 projecting toward and adapted to engage the lower surface of the locking element or nut 25, and this locking element 25 is of such length as tofit nicely and for easy' rotation between the rests 26 and 27 at one end and the upper end 28 of the hole 24. When the parts are in assembled relation, therefore, the locking element 25 may freely rotate but may not move longitudinally to any material extent.

A key-hole is formed in the plate 14 in the device of Fig. 3 having a middle circular part 30 on the axis of the nut 25 and having lateral extensions 31, the key-hole thus accommodati the stem 32 and webs 33 of the key 34. he key has an end extension 35 which enters the central hole in the nut 25, thus centering the key and holding it in place when in use.

The normally lower end of the nut 25 in the device of Figs. 3 and 6, is provided with slots 36 for receiving the web's 33 of the key.

The rests 26 and 27 provide a space 37 between the plate 14; and the lower surface of the nut 25, which space permits the turning of the key on its axis after the webs 33 have passed through the bottom plate, and it enables the operator to bring the key webs into coincidence with the slots 36 when he desires to rotate the nut, and into coincidence with the key-hole extensions 31 when he desires to remove the key from the lock.

From the foregoing it will be clear that when the nut 25 is rotated by the key the shackle 20 is moved one way or the other and thus'the end 21 of the bail ismade to enter the recess 22 in the locking operation and to move out of it in the unlocking operation. If threads of ordinary pitch beused' on the stud 23 several turns of the nut 25 will be required to free the shackle.

To prevent water and dirt from entering the look at the normally upper portion we provide the shield 40 rigidly secured upon the bail 20, the body 10 being preferably formed there with an upwardly extending conical projection and the shield 40 having a corresponding shape.

It is pointed out that a large variety of I keys may be provided for looks of this kind,

corresponding formations being made in the I nut 25, thus affording theusual security of individualized keys. Thus in Figs. 8,. 9 and 10 the nut 25 has a hole 50 for the-pin 51 of the key; in Figs. 11, 12 and 13 there is a square recess 52 in the nut adapted to receive the square part 53 of the key; and in Figs. 14, 15 and 16 there is a circular groove 55 and notch 56 in the nut 25 calling for a key having a crooked web 57 When the body 10 is made of iron the nut 25 is preferably made of brass or other metal adapted to prevent a corrosive adhesion of the two parts.

Various changes and modifications of the specific device illustrated and described are contemplated by us as being within the scope of the invention herein set forth, as

shown by the accompanying claims.

We claim:

1. In a lock, the combination of a sub stantiailiy clo'sed body, a rotatably mounted thread member bodily within the lock body and held therein against substantial longitudinal movement, a movably mounted holding member extending out of the lock member, means for moving the holding member wlth in-and-out movements; relative to the lock body, said means including a part having threads in engagement with the threads of the rotatably mounted member, and means including means within the able by a key projecting thereinto for rotating the locking element, the arrangement belng such that the rotation of the locking element moves the holding element.

3. A look comprising, in combination a body, a movably mounted shackle havinga normally free end, means on the lock body for holding the free end of the shackle when in closed position, the shackle having its other end threaded and 'extend ing loosely into the lock body, a rotatable nutlike looking element within the lock body and in threaded engagement with said threaded end portion of the shackle within the lock v body, means for holding the locking element against substantial longitudinal movement in the lock body, and means for rotating the locking element.

4. A lock comprising in combination a body, a movably mounted shackle having a normally free end adapted to engage the locking body holdingly when in closed position, the shackle having its other end threaded and extending loosely into the lock body, a rotatable nut-like locking element in threaded engagement with said threaded end portion of the shackle within the lock body, means for holding the locking element against substantial longitudinal movement in the lock body, the lock body having a key-hole substantially on the axis of the nut-like element, the last mentioned element having means for engaging the key holding'ly.

5. A look comprising in combination a body, a rotatable nut-like locking element held therein against substantial axial move- JAMES o. MOCK. BENJAMIN F. WILLISTON.

loosely and in threaded engage- 

